CN114616138B - Safety belt system for vehicle and vehicle having the same - Google Patents

Abstract

The invention relates to a seat belt system for a vehicle, the seat belt system comprising: a seat (16) having a seat frame (26) with a seat frame side part (28); a seat belt (18) with a webbing (40) assigned to the seat (16); and a seat belt tensioner assigned to the seat belt (18). The seat frame side part (28) has an opening (36) facing the side of the vehicle interior. The seat (16) has a seat cross tube, which opens into the vehicle interior through the opening (36). The seat belt tensioner is accommodated in the seat cross tube. The seat belt system also has a seat belt guide (54) and a webbing deflector (56) for the webbing (40), the seat belt guide (54) being arranged at the opening (36). The invention also relates to a vehicle having such a seat belt system.

Description

Safety belt system for vehicle and vehicle having the same

Technical Field

The present invention relates to a safety belt system for a vehicle, comprising: a seat having a seat frame with a seat frame side portion; a safety belt with a webbing belt assigned to the seat; and a safety belt tensioner assigned to the safety belt. The present invention also relates to a vehicle having such a safety belt system.

Background technique

Seat belt systems for vehicles having a seat belt tensioner are known.

In this case, a belt tensioner is used to prevent the belt from slackening. For example, a linear belt tensioner acts on an end fitting or a belt buckle and exerts a return force on it. Such a belt tensioner has a cylinder in which a linearly movable piston with a tension transmission device is arranged. In the event of activation, for example in the event of a strong impact, the piston is acted upon by a fluid that generates a negative pressure, for example via a gas generator, and thus moves in the tensioning direction.

Seat belt tensioners of this type are usually arranged laterally on the seat, where they require valuable installation space and are subject to design constraints. Alternatively, such seat belt tensioners can be arranged underneath the seat. Here, however, the connection of the webbing to the seat belt tensioner limits the flexibility of the seat belt and thus reduces the comfort of the vehicle occupant who is secured by the seat belt.

In the case of a belt buckle tensioner, the connection between the belt buckle and the belt tensioner is usually achieved via a steel cable, which allows a certain flexibility of the connection. In the case of an end fitting tensioner, the connection between the belt tensioner and the webbing is usually established via a connecting element or coupling element.

Summary of the invention

The object of the present invention is to provide a seat belt system which is not only compact in design but also highly comfortable and in which the connecting elements between the webbing and the associated belt tensioner are not visible to the vehicle occupants.

In order to achieve this object, a seat belt system for a vehicle is provided, which has: a seat having a seat frame with a seat frame side part; a seat belt with a webbing assigned to the seat; and a seat belt tensioner assigned to the seat belt. In this case, the seat frame side part has an opening facing the side of the vehicle interior. The seat has a seat cross tube, which extends into the vehicle interior through the opening. In this case, the seat belt tensioner is accommodated in the seat cross tube. The seat belt system also has a seat belt guide and a webbing deflector for the webbing. In this case, the seat belt guide is arranged at the opening.

In this case, the belt tensioner is in particular designed as an end fitting tensioner.

The term "vehicle interior" here refers to the space immediately surrounding the seats, which in a closed vehicle constitutes the vehicle interior for the vehicle occupants. However, the seat belt system according to the invention is not limited to closed vehicles and can be arranged in the same way for at least partially open vehicles. In this case, the vehicle interior relates to the space adjacent to the seats.

By accommodating the belt tensioner in the seat cross tube as a component of the seat, the belt tensioner is arranged inside the seat and does not require additional installation space outside the seat. As a result, the belt system is designed to be particularly compact.

At the same time, the belt guide and the belt deflector can ensure that the belt is guided toward the vehicle occupant so that the belt provides very good protection in a restraining situation and makes the vehicle occupant feel particularly comfortable. The belt is preferably guided into the interior of the seat cross tube so that the vehicle occupant cannot see the connecting element or coupling element between the belt and the belt tensioner.

The seat belt tensioner may have a fixing device, to which the end of the webbing is fixed, thereby ensuring that the webbing is securely attached to the seat belt tensioner.

In one embodiment, the belt guide is arranged between the webbing deflector and the fixing device, so that the webbing extends from the fixing device via the belt guide to the webbing deflector. In this way, the webbing can be guided from the belt tensioner through the opening to the vehicle occupant, so that in a restraining situation the webbing or the seat belt can be securely tensioned by means of the belt tensioner, in particular the webbing cannot be hooked or jammed.

In another embodiment, the fastening device is accommodated in the seat cross tube in the starting position of the belt tensioner and in the restraining position of the belt tensioner. The starting position is here a position in which the belt tensioner is not yet activated and is ready for activation. The restraining position is here a position in which the belt tensioner is located after activation for tensioning the webbing or the seat belt.

In particular, the belt tensioner is completely accommodated in the seat cross tube in the starting position and in the restraining position, whereby the belt system can be designed to be particularly compact.

It can be provided that the belt guide has a guide section in the form of a ring or a ring section. This ensures that the belt is reliably guided in different positions in which the belt extends away from the opening toward the vehicle occupant in different radial directions.

In particular, the guide section can be designed in the shape of a circular ring, whereby the guidance is identical in all radial directions.

According to one embodiment, the webbing deflector is pivotably attached to the seat. In this way, the seat belt is designed to be flexible via the connection of the webbing to the seat belt tensioner, so that the webbing course can be adjusted by the vehicle occupant to a position that he feels comfortable.

Advantageously, the webbing deflector has a guide opening through which the webbing extends. As a result, the webbing is safely guided by the webbing deflector in all positions of the safety belt. Furthermore, the webbing cannot slip out of the webbing deflector laterally, so that it is always ensured that the safety belt system provides a defined and high protective effect in a restraining situation.

According to a further embodiment, the webbing deflector is attached to a seat frame side part, whereby the webbing deflector can be arranged particularly stably and with little installation space requirement.

The seat cross tube can be an integrated component of the seat frame, whereby the belt tensioner can be fastened in the seat in a particularly stable manner.

In order to achieve the above-mentioned object, the present invention also provides a vehicle having a seat belt system according to the invention with the above-mentioned advantages.

BRIEF DESCRIPTION OF THE DRAWINGS

Other advantages and features will be found in the following and in the accompanying drawings. The drawings show:

FIG. 1 shows a schematic diagram of a vehicle according to the invention having a seat belt system according to the invention,

FIG. 2 shows a perspective view of the seat belt system from FIG. 1 according to a first embodiment,

FIG. 3 shows a detailed view of a portion C of the seat belt system in FIG. 2 ,

FIG. 4 shows an exploded view of the seat belt system in FIG. 2 ,

FIG. 5 shows an exploded view of the seat belt tensioner and the webbing guide of the seat belt system in FIG. 2 ,

FIG. 6 shows a detail view of the seat belt system in FIG. 1 with a retainer according to another embodiment,

FIG. 7 shows a side view of the holder in FIG. 6 ,

FIG. 8 shows a detail of the seat belt system from FIG. 1 with a retainer according to another embodiment, and

FIG. 9 shows a side view of the holder in FIG. 8 .

Detailed ways

FIG. 1 shows a vehicle 10 having a seat belt system 12 , which is arranged in a vehicle interior 14 of the vehicle 10 .

The vehicle 10 may be any vehicle used for transporting passengers, such as a car, truck, or bus.

The seat belt system 12 includes a seat 16 (see FIG. 2 ), a seat belt 18 , and a seat belt tensioner 20 (see FIG. 4 ).

The seat 16 has a seat surface 22 and a seat back 24 which together define a seat direction A which corresponds to the orientation or the line of sight of a vehicle occupant seated in the seat 16 when the vehicle occupant is looking straight ahead.

Furthermore, the seat 16 has a seat frame 26 , by means of which the seat surface 22 and the seat back 24 are fastened to a floor in the vehicle interior 14 .

The seat frame 26 includes two seat frame side parts 28 , 29 arranged on opposite sides of the seat 16 , and a seat cross tube 30 connecting the two seat frame side parts 28 , 29 to each other.

The seat cross tube 30 extends in a direction B through the seat 16 , wherein the direction B is transverse to the seat direction A.

In this embodiment, direction B extends horizontally and perpendicular to seat direction A.

Of course, in alternative embodiments, the seat cross tube 30 may extend through the seat 16 in any direction.

The seat cross tube 30 is designed in the form of a hollow cylinder with a circular cross section, wherein the hollow space in the interior of the seat cross tube 30 forms a receptacle 32 for the belt tensioner 20 .

In principle, the seat cross tube 30 can be designed in any desired manner as long as it has a receptacle 32 for the belt tensioner 20 .

The seat frame side part 28 has a passage 34 which extends in the direction B through the seat frame side part 28 and opens via an opening 36 into an outer side 38 of the seat frame side part 28 which faces the vehicle interior 14 .

The seat cross tube 30 is connected to the seat frame side part 28 , so that the seat cross tube 30 opens into the vehicle interior 14 via a passage 34 and the opening 36 forms an access to the receptacle 32 .

The seat frame 26 is made of steel, wherein the seat frame side parts 28 , 29 are welded to the seat cross tube 30 .

In an alternative embodiment, the seat frame side parts 28 , 29 and/or the seat cross tube 30 may each be made of any desired, preferably high-strength material.

Additionally or alternatively, the seat frame side parts 28 , 29 may be connected to the seat cross tube 30 in any manner, in particular in one piece.

Of course, the seat cross tube 30 may alternatively be a separate component, ie, not a part of the seat frame 26 and/or not integrally connected to the seat frame side portion 28 .

In an alternative embodiment, the seat 16 can be designed in any manner as long as it has at least one seat frame side part 28 , 29 and a seat cross tube 30 , the receiving portion 32 of which is connected to the vehicle interior space 14 or opens into the vehicle interior space 14 via the seat frame side parts 28 , 29 .

The safety belt 18 , only a portion of which is shown in the drawings, includes a webbing 40 having an end portion 42 (see FIG. 5 ).

In one embodiment, the seat belt 18 is a 3-point seat belt.

The end portion 42 is formed by a webbing loop of the webbing 40 .

In principle, the end 42 of the webbing 40 can be designed in any desired manner.

The belt tensioner 20 has a tensioning unit 44 and a tension transmission device 46 with a fastening device 48 for the webbing 40 .

The fixing device 48 is an accessory in the form of a webbing buckle, through which a webbing loop extends, thereby fixing the end 42 of the webbing 40 to the tension transmission means 46 .

In principle, the fastening device 48 can be designed in any desired manner and the end 42 of the webbing 40 can be fastened to the tension transmission element 46 in any desired manner.

The tension transmission means 46 is a steel cable in this case.

In an alternative embodiment, the tension transmission device 46 can of course be designed arbitrarily, for example, as a rod or a cable.

The belt tensioner 20 is provided to pull the end 42 of the webbing 40 in a direction B in order to tension the webbing 40 and thereby the seat belt 18 in a restraining situation, for example in the event of an accident.

The belt tensioner 20 therefore has a starting position shown in FIG. 5 and a restraining position in which the securing device 48 is adjusted in the direction B relative to the starting position by means of the tensioning unit 44 via the tension transmission means 46 .

The energy required for tensioning the webbing 40 is provided by a drive of the tensioning unit 44 , for example in the form of a pyrotechnic gas generator.

The seat belt tensioner 20 is a linear end fitting tensioner in this embodiment.

In an alternative embodiment, the seat belt tensioner 20 may be any seat belt tensioner.

The belt tensioner 20 is arranged in the receptacle 32 and is fixed in the seat cross tube 30 by means of a retaining fitting 50 .

In principle, the belt tensioner 20 can be fastened in any desired manner in the seat cross tube 30 .

In this case, the seat belt system 12 is designed such that the seat belt tensioner 20 is completely accommodated in the receptacle 32 both in the starting position and in the restraining position.

In particular, the fastening device 48 is arranged in the starting position in the direction B in front of the opening 36 , so that the webbing 40 extends from the fastening device 48 through the opening 36 into the vehicle interior 14 .

To ensure a secure and comfortable course of the seat belt 18 , the seat belt system 12 has two webbing guides 52 in the form of a belt guide 54 and a webbing deflector 56 , which are described below with reference to FIG. 3 .

The webbing guide 52 is a one-piece component made of steel and is therefore designed to be particularly robust.

In principle, the belt guide 54 and/or the webbing deflector 56 can be of any desired design and, in particular, can be made of any desired material.

The belt guide 54 and the webbing deflector 56 are each attached to the outer side 38 of the seat frame side part 28 by means of screws 58 , 59 and are fastened to the seat frame side part 28 in a particularly simple and secure manner in this manner.

In an alternative embodiment, the belt guide 54 and/or webbing deflector 56 may of course be secured in any manner.

The belt guide 54 is arranged at the opening 36 and has a circular guide channel 60 which extends in direction B through the belt guide 54 .

At the location where the guide channel 60 opens into the vehicle interior 14 , the belt guide 54 has a guide section 62 which circularly surrounds the opening and is provided as a stop surface for the webbing 40 .

The guide section 62 is formed here by a chamfer at the end of the guide channel 60 which faces the vehicle interior 14 .

In an alternative embodiment, the guide section 62 can be designed arbitrarily, for example, to be rounded.

Furthermore, the guide section 62 may not extend completely around the inlet, but only partially around the inlet, so that the guide section 62 has the shape of a ring segment instead of the shape of a closed ring.

In this case, the guide section 62 is preferably arranged between the opening 36 and the webbing deflector 56 , so that the webbing 40 rests against the guide section 62 when the webbing is extended from the belt tensioner 20 toward the vehicle occupant.

In contrast to the guide section 62, the belt guide 54 has a sleeve-shaped connection joint 64 (see FIG. 5 ) which extends into the through-portion 34. When connected with the screw 58, the belt guide 54 is thus fixedly attached to the seat frame side part 28 in a rotationally fixed manner.

In an alternative embodiment, the connection joint 64 can be designed arbitrarily.

Furthermore, the belt guide 54 can be provided without the connecting joint 64 .

In principle, the belt guide 54 can be designed in any desired manner, in particular the guide channel 60 .

The webbing deflector 56 is provided on the vehicle occupant side of the belt guide 54. That is, the webbing 40 extends from the vehicle occupant through the belt guide 54 to the belt tensioner 20 via the webbing deflector 56.

In this embodiment, no other webbing guide 52 is provided between the webbing deflector 56 and the vehicle occupant.

Of course, in an alternative embodiment, other webbing guides 52 may be provided, in particular, before and/or after the webbing deflector 56 , as shown in the embodiments of FIGS. 6 to 9 .

The webbing deflector 56 has a guide opening 66 (see FIG. 5 ) through which the webbing 40 extends from the vehicle occupant to the belt guide 54 .

The guide opening 66 is annular and therefore closed on the circumferential side.

Alternatively, the guide opening 66 may be open on the circumferential side, for example in the form of a lateral groove in the webbing deflector 56 .

The guide opening 66 is attached to the seat frame side part 28 pivotably about the rotation axis D relative to the seat frame side part 28 , so that the orientation of the webbing deflector 56 and thus of the guide opening 66 can be matched to different webbing courses of the seat belt 18 .

The guide section 62 and the guide opening 66 are preferably designed in such a way that they guide the webbing 40 with low friction in order to keep the wear of the webbing 40 low and to ensure a high operational safety of the seat belt system 12 .

A seat belt system 12 according to another embodiment will now be described with reference to Figures 6 and 7. The same reference numerals are used to designate components known from the above embodiments and reference is made to the above description.

In this embodiment, the seat belt system 12 has another webbing guide 52 in the form of a second belt guide 68, which is arranged on the vehicle occupant side of the webbing deflector 56. That is, the webbing 40 extends from the vehicle occupant through the second belt guide 68 to the webbing deflector 56 and from there through the belt guide 54 to the belt tensioner 20.

In addition, different from the embodiments shown in FIG. 2 to FIG. 5 , the guide channel 60 is not circular, but is only designed to be annular. Of course, it can also be other shapes.

The second belt guide 68 has an elongated guide opening 70 (see FIG. 7 ) through which the webbing 40 extends from the vehicle occupant to the webbing deflector 56 .

The elongated guide opening 70 is annular and therefore closed on the circumferential side.

Alternatively, the elongated guide opening 70 can be open on the circumferential side, for example by means of lateral grooves of the second belt guide 68 .

The elongated guide opening 70 also has a width E which is greater than the width e of the webbing 40 , whereby the webbing is guided by the second belt guide 68 over the entire width to the vehicle occupant.

Similar to the guide section 62 and the guide opening 66 , the elongated guide opening 70 is also preferably designed such that it guides the webbing 40 with less friction, in order to keep the wear of the webbing 40 low and ensure high operational safety of the seat belt system 12 .

In this case, the second belt guide 68 and the webbing deflector 56 are connected to one another via a bracket 72 and together form a retainer 74 of the belt system 12 .

In the exemplary embodiment shown, the holder 74 is designed in one piece, for example as a bent punched part, so that it is designed to be particularly cost-effective and compact.

The holder 74 has a fastening opening 76 which is arranged at the end of the bracket 72 opposite the second belt guide 68 .

The holder 74 is attached to the seat frame side part 28 pivotably about the rotation axis D relative to the seat frame side part 28 via the fixing opening 76. The orientation of the webbing deflector 56 and the second belt guide 68 and thus the orientation of the guide opening 66 and the elongated guide opening 70 can thus be adapted to different webbing courses of the seat belt 18.

In the illustrated exemplary embodiment, the retainer 74 is fastened together with the belt guide 54 to the seat frame side part 28 by means of screws 58 , so that the belt system 12 is designed to be particularly compact and have a low mass.

In principle, the holder 74 can be attached to the seat frame side part 28 at any location and in any desired manner, in particular by means of separate fastening elements.

Here, the guide opening 66 is disposed below the elongated guide opening 70 relative to the vehicle occupant such that the webbing deflector 56 guides the webbing 40 toward the opening 36 and absorbs loads from the webbing 40 in a restraining situation.

In an alternative embodiment, the retainer 74 could of course be rigidly, ie, non-pivotably, attached to the seat frame side portion 28 .

A seat belt system 12 according to another embodiment will now be described with reference to Figures 8 and 9. For components known from the above embodiments, the same reference numerals are used and reference is made to the above description.

Unlike the embodiment shown in FIGS. 6 and 7 , the webbing deflector 56 is pivotally attached to the bracket 72 about an axis of rotation F relative to the bracket 72 .

To this end, the webbing deflector 56 may be pivotably secured to the bracket 72 by means of securing elements such as screws 58 , 59 or rivets.

By virtue of the retainer 74 being pivotably attached about the rotation axis D and the webbing deflector 56 additionally about the rotation axis F relative to the seat frame side part 28, the orientation of the webbing deflector 56 and of the second belt guide 68 and thereby of the guide opening 66 and of the elongated guide opening 70 can be matched independently of one another to different webbing paths of the seat belt 18, thereby ensuring particularly advantageous and effective belt guiding.

In an alternative embodiment where the retainer 74 is rigidly attached to the seat frame side portion 28 , the pivotable webbing deflector 56 ensures that the orientation of the webbing deflector 56 , and thus the orientation of the guide opening 66 , can still match different webbing runs of the seat belt 18 .

In this way, a belt system 12 is provided in all exemplary embodiments which does not require any installation space at the side of the seat 16 for the belt tensioner 20 .

The tensioning unit 44 and the drive of the belt tensioner 20 are completely installed in the seat cross tube 30 , so that hot gases or particles (especially in the case of a smoke drive) from the drive of the belt tensioner 20 can be reliably prevented from coming into contact with flammable or heat-sensitive materials.

Even without the additional covering, the tensioning unit 44 is not visible to the vehicle occupants. Similar to an application without the seat belt tensioner 20, only the webbing 40 and the webbing guide 52 are visible.

By flexibly positioning the webbing deflector 56 and/or the second seat belt guide 68, the webbing direction required by the vehicle occupant can be adjusted as needed, thereby avoiding body slippage (meaning that the body slips out from under the seat belt during a frontal collision) and improving the comfort of the vehicle occupant.

The seat belt system 12 may further include a baffle (not shown) that conceals the webbing guide 52 from the vehicle interior 14 to meet functional, safety, and/or design requirements.

The invention is not limited to the illustrated embodiments. In particular, individual features of the embodiments can be combined arbitrarily with features of other embodiments, in particular independently of other features of the respective embodiment.

Claims (11)

1. A seat belt system for a vehicle (10), the seat belt system having: a seat (16) having a seat frame (26) with seat frame sides (28, 29); a seat belt (18) with a webbing (40) that is provided to the seat (16); and a belt tensioner (20) assigned to the seat belt (18), wherein the seat frame sides (28, 29) have an opening (36) facing the side of the vehicle interior (14),

It is characterized in that the method comprises the steps of,

The seat (16) has a seat rail (30) which has a receptacle (32) for a seat belt tensioner (20) and is connected to a seat frame side, which opens into the vehicle interior (14) via the opening (36) and which opening (36) forms an inlet to the receptacle (32), wherein the seat belt tensioner (20) is completely accommodated in the seat rail (30) in both a starting position and a restraining position,

Wherein the seat belt system (12) has a seat belt guide (54) and a belt deflector (56) for the seat belt (40),

Wherein the belt guide (54) is arranged at the opening (36).

2. The seat belt system according to claim 1, characterized in that the seat belt tensioner (20) is provided as an end fitting tensioner.

3. The seat belt system according to claim 1, characterized in that the seat belt tensioner (20) has a fixing device (48) to which an end (42) of the webbing (40) is fixed.

4. A seat belt system according to claim 3, wherein the seat belt guide (54) is arranged between the webbing deflector (56) and the fixing means (48).

5. The seat belt system according to claim 3 or 4, characterized in that the securing device (48) is accommodated in the seat cross tube (30) in a starting position of the seat belt tensioner (20) and in a restraining position of the seat belt tensioner (20).

6. The seat belt system according to one of claims 1 to 4, characterized in that the seat belt guide (54) has a guide section (62) in the form of a ring or ring section.

7. The seat belt system according to one of claims 1 to 4, characterized in that the webbing deflector (56) is pivotably attached to the seat (16).

8. The seat belt system according to one of claims 1 to 4, characterized in that the webbing deflector (56) has a guide opening (66) through which the webbing (40) extends.

9. The seat belt system according to one of claims 1 to 4, characterized in that the webbing deflector (56) is attached to the seat frame side (28, 29).

10. The seat belt system according to one of claims 1 to 4, characterized in that the seat cross tube (30) is an integrated part of the seat frame (26).

11. A vehicle having a seat belt system (12) according to one of claims 1 to 10.